/* Header layout for Play Nova Arena */
.pna-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(5, 7, 19, 0.92) 0%, rgba(5, 7, 19, 0.82) 65%, rgba(5, 7, 19, 0) 100%);
  border-bottom: 1px solid rgba(148, 163, 199, 0.16);
}

.pna-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  gap: var(--space-4);
}

/* Brand */
.pna-header__brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.pna-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}

.pna-header__logo-mark {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, #ffffff 0%, #a88bff 24%, #7d5cff 50%, #050713 100%);
  box-shadow: var(--shadow-glow-primary);
}

.pna-header__logo-orb {
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  border: 1px solid rgba(226, 232, 240, 0.45);
  box-shadow: inset 0 0 12px rgba(15, 23, 42, 0.86);
}

.pna-header__title-group {
  display: flex;
  flex-direction: column;
}

.pna-header__title {
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pna-header__subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */
.pna-header__nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-5);
}

.pna-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.pna-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
  padding-block: 0.25rem;
}

.pna-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.35rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #7d5cff, #ff5a7a);
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.pna-header__nav-link:hover,
.pna-header__nav-link:focus-visible {
  color: #ffffff;
}

.pna-header__nav-link:hover::after,
.pna-header__nav-link:focus-visible::after,
.pna-header__nav-link--active::after {
  transform: scaleX(1);
}

.pna-header__nav-link--active {
  color: #ffffff;
}

/* CTA group */
.pna-header__cta-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.pna-header__cta {
  font-size: var(--font-size-xs);
}

/* Mobile toggle */
.pna-header__toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 199, 0.5);
  background-color: rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  cursor: pointer;
}

.pna-header__toggle-icon {
  width: 18px;
  height: 14px;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.pna-header__toggle-line {
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background-color: var(--gray-700);
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.pna-header__toggle-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Toggle open state */
.pna-header__toggle[aria-expanded="true"] .pna-header__toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.pna-header__toggle[aria-expanded="true"] .pna-header__toggle-line:nth-child(2) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (prefers-reduced-motion: reduce) {
  .pna-header__toggle-line {
    transition: none;
  }
}

/* Responsive behavior */
@media (max-width: 900px) {
  .pna-header__inner {
    align-items: center;
  }

  .pna-header__nav {
    position: fixed;
    inset-inline: 0;
    top: var(--nav-height);
    background-color: rgba(5, 7, 19, 0.98);
    border-bottom: 1px solid rgba(148, 163, 199, 0.18);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-4);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility 0s linear var(--transition-normal);
  }

  .pna-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }

  .pna-header__nav-link {
    font-size: var(--font-size-md);
  }

  .pna-header__cta-group {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .pna-header__cta {
    flex: 1 1 auto;
    justify-content: center;
  }

  .pna-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
  }

  .pna-header__toggle {
    display: inline-flex;
  }
}

@media (min-width: 901px) {
  .pna-header__toggle {
    display: none;
  }
}

/* High-contrast focus ring override for important controls */
.pna-header__toggle:focus-visible,
.pna-header__nav-link:focus-visible,
.pna-header__cta:focus-visible {
  outline: 2px solid var(--color-primary-strong);
  outline-offset: 2px;
}